Multitrait-Multimethod Matrix

A Multitrait-Multimethod (MTMM) Matrix is a tool used in research to assess how well different measurement methods capture various traits or characteristics. For example, if studying personality traits like extraversion, researchers might use questionnaires, interviews, and behavioral observations. The matrix compares results across these methods to see if they consistently measure the same trait (convergent validity) and differentiate from other traits (discriminant validity). A clear pattern indicates reliable, valid measurement tools, while inconsistencies suggest issues with measurement accuracy. Essentially, it helps ensure that the tools used truly reflect what they are intended to measure.